As we now know, this extensive desert region contains two large craters with dark, windblown dust streaks and the gigantic canyon Valles Marineris
. All three features were portrayed as canals by many 19th-century astronomers and given various names.
The HRSC image runs from northwest to the southeast across the Tharsis region from the polar ice cap in the lower-left corner of the image, over the giant volcano Alba Mons, part of Olympus Mons, the Tharsis volcanoes Ascraeus Mons and Pavonis Mons shown as dark patches above the cloud cover and finally across the net-like Noctis Labyrinthus and the valley system of Valles Marineris
, with its characteristic dark-coloured deposits in the top left-hand corner of the image.
Olympus Mons is roughly 27 kilometres high, about three times as tall as Mount Everest, while the Valles Marineris
can go as deep as 8 to 10 kilometres in some places and runs for roughly 4,000 kilometres, which is close to the width of Australia.
was perhaps made by flowing lava in the planet's history, but its 4,000 kilometers make it the longest formation of its kind on a non-Earth planet (Venus also has similar-sized chasms, perhaps rift valleys like on Earth).
Noctis Labyrinthus is a huge region of tectonically controlled valleys located at the western end of the Valles Marineris
It is some 170 km south of Eos Chaos, which lies in the far eastern section of Valles Marineris
Elsewhere in the show, this conflicted dynamic opened onto other antagonisms endemic to AbEx: intuitive spontaneity versus composition (see the tussle between drip and symmetry in Longhand, 2007), for example, or the grid as self-referential versus the grid as a portal to those regions beyond that it was meant to annul (the inky rectilinear armature of Valles Marineris
, 1992, simultaneously forswears illusionist space and creates windowlike apertures).
Secondary dust cores originated around Solis Lacus and spread along Valles Marineris
. A general yellow haze quickly spread over the planet, making the event not only encircling but global.
Filling Mars' Valles Marineris
, the largest canyon in the solar system, with genetically modified redwoods would indicate that we do not properly appreciate its present desolate beauty.
Where would you find Valles Marineris
, a great chasm some 4,000km long?
10 At 2,500 miles long and four miles deep, Valles Marineris
is the Solar System's biggest canyon - on which planet is it?
However, the Google Mars site features a 3-D fly-through movie of Valles Marineris
, a Martian canyon system 4,500 KM in length.